[yul-naco] 400 fields with $w - they should not be changed

[Manon Theroux]

Dear NACO catalogers,

If you are updating an existing authority record, 
and that record has a 400 field with a subfield $w, such as:

$w nna
$w nnaa
$w nne
$w nnea

please do NOT update the field by changing the 
heading in any way (e.g., by adding a death date).

The subfield $w indicates that the 400 field 
contains an earlier form of heading - if you 
change it, it no longer represents the earlier form of the heading.

Hypothetical example:

100 1# $a Massey, Janet, $d 1900-
400 1# $w nnaa $a Massey, Janet Elvira (Miller), $d 1900-

If you are adding a death date to the 100 field, 
you would NOT also add it to the 400 field coded 
$w nnaa because that heading represents the 
pre-AACR2 form of heading. If you add the death 
date to the 400, it will no longer be the pre-AACR2 heading.

I've been coming across examples of NACO 
participants elsewhere who are adding death dates 
to these 400s, so I thought I'd warn you. I've 
shown the records to LC. One example:

OLD:
040 ·· ‡aDLC‡beng‡cDLC‡dDLC‡dNcU‡dOCoLC‡dDLC-R
100 1· ‡aNixon, Richard M.‡q(Richard Milhous),‡d1913-
400 1· ‡wnna‡aNixon, Richard Milhous,‡d1913-
NEW:
040 ·· ‡aDLC‡beng‡cDLC‡dDLC‡dNcU‡dOCoLC‡dDLC-R‡dSdMadT
100 1· ‡aNixon, Richard M.‡q(Richard Milhous),‡d1913-1994
400 1· ‡wnna‡aNixon, Richard Milhous,‡d1913-1994

I've also noticed records on which LC is doing 
the following (but I remember no instructions 
from LC along these lines, so I've asked for clarification):

OLD:
040 ·· ‡aDLC‡beng‡cDLC‡dDLC‡dOCoLC‡dUPB
100 1· ‡aWhite, E. B.‡q(Elwyn Brooks),‡d1899-
400 1· ‡wnna‡aWhite, Elwyn Brooks,‡d1899-
NEW:
040 ·· ‡aDLC‡beng‡cDLC‡dDLC‡dOCoLC‡dUPB‡dDLC
100 1· ‡aWhite, E. B.‡q(Elwyn Brooks),‡d1899-1985
400 1· ‡aWhite, Elwyn Brooks,‡d1899-1985
400 1· ‡wnnaa‡aWhite, Elwyn Brooks,‡d1899-

The above approach is a great solution *if* your 
system pays attention the fact that $w nnaa is 
not supposed to display to the public. 
Unfortunately, Voyager doesn't pay attention to 
these things and displays both references to the public.

-Manon

P.S. Remember that in OCLC, these $w display at 
the END of the field not the beginning (but the 
400 string should still not get changed). 
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